CEACAM5 and AIDS dementia complex: In another study, using microarrays and RT-qPCR assays, Chao A. et al. identified a group of four genes (CEACAM5, TACSTD1, S100P, and MSLN) that were overexpressed in ADC vs. SCC; in this study, CEACAM and TACSTD1 were prognostic factors [15].